Uranium diffusion in metals used in nuclear facilities - A new approach

Autores
Perez, Rodolfo Ariel
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Diffusion at infinite dilution of U in metals, with particular emphasis in those used in nuclear facilities, is revisited. Early works present some particularities such as activation enthalpies lower than the vacancy formation enthalpy in the matrix, large differences with self-diffusion in the base material, up to four orders of magnitude differences between measurements performed by different authors in similar temperature ranges, etc. In particular U self-diffusion was qualified as abnormal when compared with other metals. Recent studies by means of á-spectrometry reveal a normal behaviour: Activation enthalpies and pre-exponential factors similar to the self-diffusion one and diffusion coefficient values in the same order of magnitude than self-diffusion. The possible influence of short circuits, impurities and/or uncertainties in the techniques used in the early works is discussed in order to explain the differences obtained.
Fil: Perez, Rodolfo Ariel. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Diffusion
Nuclear Materials
Uranium
Α-Spectrometry
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72663

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spelling Uranium diffusion in metals used in nuclear facilities - A new approachPerez, Rodolfo ArielDiffusionNuclear MaterialsUraniumΑ-Spectrometryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Diffusion at infinite dilution of U in metals, with particular emphasis in those used in nuclear facilities, is revisited. Early works present some particularities such as activation enthalpies lower than the vacancy formation enthalpy in the matrix, large differences with self-diffusion in the base material, up to four orders of magnitude differences between measurements performed by different authors in similar temperature ranges, etc. In particular U self-diffusion was qualified as abnormal when compared with other metals. Recent studies by means of á-spectrometry reveal a normal behaviour: Activation enthalpies and pre-exponential factors similar to the self-diffusion one and diffusion coefficient values in the same order of magnitude than self-diffusion. The possible influence of short circuits, impurities and/or uncertainties in the techniques used in the early works is discussed in order to explain the differences obtained.Fil: Perez, Rodolfo Ariel. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaTrans Tech Publications2017-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72663Perez, Rodolfo Ariel; Uranium diffusion in metals used in nuclear facilities - A new approach; Trans Tech Publications; Defect and Diffusion Forum; 375; 6-2017; 3-171012-0386CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.4028/www.scientific.net/DDF.375.3info:eu-repo/semantics/altIdentifier/url/https://www.scientific.net/DDF.375.3info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:40:24Zoai:ri.conicet.gov.ar:11336/72663instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:40:25.219CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Uranium diffusion in metals used in nuclear facilities - A new approach
title Uranium diffusion in metals used in nuclear facilities - A new approach
spellingShingle Uranium diffusion in metals used in nuclear facilities - A new approach
Perez, Rodolfo Ariel
Diffusion
Nuclear Materials
Uranium
Α-Spectrometry
title_short Uranium diffusion in metals used in nuclear facilities - A new approach
title_full Uranium diffusion in metals used in nuclear facilities - A new approach
title_fullStr Uranium diffusion in metals used in nuclear facilities - A new approach
title_full_unstemmed Uranium diffusion in metals used in nuclear facilities - A new approach
title_sort Uranium diffusion in metals used in nuclear facilities - A new approach
dc.creator.none.fl_str_mv Perez, Rodolfo Ariel
author Perez, Rodolfo Ariel
author_facet Perez, Rodolfo Ariel
author_role author
dc.subject.none.fl_str_mv Diffusion
Nuclear Materials
Uranium
Α-Spectrometry
topic Diffusion
Nuclear Materials
Uranium
Α-Spectrometry
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Diffusion at infinite dilution of U in metals, with particular emphasis in those used in nuclear facilities, is revisited. Early works present some particularities such as activation enthalpies lower than the vacancy formation enthalpy in the matrix, large differences with self-diffusion in the base material, up to four orders of magnitude differences between measurements performed by different authors in similar temperature ranges, etc. In particular U self-diffusion was qualified as abnormal when compared with other metals. Recent studies by means of á-spectrometry reveal a normal behaviour: Activation enthalpies and pre-exponential factors similar to the self-diffusion one and diffusion coefficient values in the same order of magnitude than self-diffusion. The possible influence of short circuits, impurities and/or uncertainties in the techniques used in the early works is discussed in order to explain the differences obtained.
Fil: Perez, Rodolfo Ariel. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Diffusion at infinite dilution of U in metals, with particular emphasis in those used in nuclear facilities, is revisited. Early works present some particularities such as activation enthalpies lower than the vacancy formation enthalpy in the matrix, large differences with self-diffusion in the base material, up to four orders of magnitude differences between measurements performed by different authors in similar temperature ranges, etc. In particular U self-diffusion was qualified as abnormal when compared with other metals. Recent studies by means of á-spectrometry reveal a normal behaviour: Activation enthalpies and pre-exponential factors similar to the self-diffusion one and diffusion coefficient values in the same order of magnitude than self-diffusion. The possible influence of short circuits, impurities and/or uncertainties in the techniques used in the early works is discussed in order to explain the differences obtained.
publishDate 2017
dc.date.none.fl_str_mv 2017-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/72663
Perez, Rodolfo Ariel; Uranium diffusion in metals used in nuclear facilities - A new approach; Trans Tech Publications; Defect and Diffusion Forum; 375; 6-2017; 3-17
1012-0386
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72663
identifier_str_mv Perez, Rodolfo Ariel; Uranium diffusion in metals used in nuclear facilities - A new approach; Trans Tech Publications; Defect and Diffusion Forum; 375; 6-2017; 3-17
1012-0386
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.4028/www.scientific.net/DDF.375.3
info:eu-repo/semantics/altIdentifier/url/https://www.scientific.net/DDF.375.3
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Trans Tech Publications
publisher.none.fl_str_mv Trans Tech Publications
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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